What do Group C and D atmospheres encompass?
What will be an ideal response?
Group C contains flammable gas or flammable liquid-produced vapor having either a maximum experimental safe gap value greater than 0.45 mm and less than or equal to 0.75 mm, or a minimum ignition current ratio greater than 0.40 mm and less than or equal to 0.80 mm. Group D contains flammable gas or flammable-produced vapor having either a MESG value greater than 0.75 mm or a minimum current ratio greater than 0.80 mm.
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How do you know that the starter has energized?
What will be an ideal response?
What were the four "cradles of civilization"?
What will be an ideal response?
The abbreviation for the plastic pipe used in systems for water and gas supply lines and irrigation systems is ____________________.
Fill in the blank(s) with the appropriate word(s).
Theodora and Justinian ruled the Roman Empire from the magnificent city of
a. Rome. b. Lyons. c. Constantinople. d. Alexandria.